// Copyright 2023 The Perses Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import { ReactElement, useContext, useRef } from 'react';
import { Box } from '@mui/material';
import { PanelEditorValues } from '@perses-dev/core';
import { Panel } from '../Panel';
import { PanelEditorContext } from '../../context';

const PANEL_PREVIEW_HEIGHT = 300;
const PANEL_PREVIEW_DEFAULT_WIDTH = 840;

export function PanelPreview({ panelDefinition }: Pick<PanelEditorValues, 'panelDefinition'>): ReactElement | null {
  const boxRef = useRef<HTMLDivElement>(null);
  let width = PANEL_PREVIEW_DEFAULT_WIDTH;

  const panelEditorContext = useContext(PanelEditorContext);

  if (boxRef.current !== null) {
    width = boxRef.current.getBoundingClientRect().width;
    panelEditorContext?.preview?.setPreviewPanelWidth?.(width);
  }

  if (panelDefinition.spec.plugin.kind === '') {
    return null;
  }

  return (
    <Box ref={boxRef} height={PANEL_PREVIEW_HEIGHT}>
      <Panel definition={panelDefinition} />
    </Box>
  );
}
